{
  "manageEntity": {
    "action": "Save",
    "entityId": "1175180205",
    "entityType": "Track",
    "nonce": "1785738084676937311",
    "signature": "0x08fd38e3d7e7bfe2b051675842e5001801175fb723cb80e6a3ffe014b21c5f6f1478ef8db426730bf17442ffb126d3864c1879008aeccda9ce83d153657249b61b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}